Thermostat for motor vehicles



Dec. 20, 1927.

H. T. WOOLSQN THERMOSTAT FOR MOTOR VEHICLES Filed Jan. 21. 1926 Patented Dec. 20, 1927.

UNITED STATES HARRY T. WOOLSON, OF DETROIT, MICHIGAN.

THERMOSTAT FOR MOTOR, VEHICLES. I

Application filed January 21, 1926. Serial No. 82,862.

It is the primary object of my invention to provide a cheap and economical thermostatically'operated device for controlling the passageway of a motor vehicle such as is commonly used for connecting the internal combustion engine and the radiator of the vehicle.

With the above and other objects in view, my invention consists in the arrangement,

combination and construction of the various parts of my improved device as described in the specification, claimed in my claims and shown in the accompanying drawings, in which:

Fig. 1 is a side elevation illustrating diagrammatically in internal combustion engine, certain parts being cut away to show the positioning of my improved device.

Fig. 2 is an enlarged detailed view showing my improved thermostat in closed position.

Fig. 3 is a similar enlarged detailed View showing my improved thermostat in open position.

I have diagrammatically shown a conven tional internal combustion engine 10 having a head 11 thereon within which is a water chamber 12. Communicating with the chamber 12 is a casting 13 having an aperture 14 forming a continuation of the water chamber or passageway 12. The casting 13 is flanged around its lower edges as at 15 to engage with the flanged portion 16 of the head 11.

Positioned between the flanges of the head 11 and the casting 13 is a plate 17 which extends across the passageway formed by the continuation of the chamber 12 and the opening 14 to close the same with the exception of the apertures 18 provided in the plate and a tubular member 19.

The tubular member 19 is inserted through the center of the plate 17 and flanged over at its top as at 20 so as to be supported from the plate. A circular plate 21 of thermostatic metal is positioned around the tubular member 19 directly under the plate 17 with its outer edges bearing against the plate 17 and its inner edges slightly spaced therefrom. In this connection it will be noted that both the plate 17 and the plate 21 are downwardly dished.

A plurality of chambers 22 may be formed around the tubular member 19, each enclosing a circle of holes 23 in the tubular member. The chambers 22 are formed by providing a convex plate 24 around the tubular member 19 having a flanged outer end 25 engaging with the flanged outer end 26 of a v concave plate 27. The flanges 25 and 26 may be welded, riveted or otherwise joined together.

As many of the chambers 22 as are desired may be positioned upon the tubular member 19 and beneath the lowermost chamber a coiled spring 28 is positioned around the tubular member 19 bearing at its bottom against a washer 29, held in place by a cotter pin 30. A bottom closure member 31 for the tubular member 19 is likewise held against displacement by the cotter pin 30.

It will be noted that both the convex members 24 and the concave members 27 of the chambers 22 are provided with openings 32 and that a plate 33 of thermostatic metal is positioned around the tubular member 19 over the convex plate 24, while a plate 34 is positioned around the tubular member 19 and under the concave plate 27. The plates 33 and 34 in their closed position bear against the plates 24 and 27 adjacent their outer edges so as to seal the openings 32, but are slightly spaced from the plates 24 and 27 at their inner edges.

In the practical operation of my improved device when the internal combustion engine is relatively cool so that its cooling liquid is likewise cool, the position of the parts will be as shown in Fig. 2 so as to prevent circulation of the water in the engine from the chamber 12 to the passage 14. When the water in the engine becomes heated, however, the thermostatic plates 21, 33 and 34 will begin to straighten out so as to bring their inner edges to bear against the plates 17, 24 and 27 respectively while their outer edges will be moved out of contact with the said plates so as to open the holes 18 and 32 to permit the passage of water therethrough. ater passing through the holes 18 will naturally proceed through the passage 14 to the radiator for cooling while the water passing through the holes 32 will pass through the holes 23 in the tubular member 19 and out through the top of the tubular member 19 into the passage 14 and thence to the cool ing radiator.

It will be obvious that various changes may be made in the arrangement, combination and construction of the various parts of my improved device without departing from thespirit of my invention, and it is my intention to cover by my claims such changes as may be reasonably included Within the scopethereof.

What I claim is:

1. In combination, a passage, a plate posi 'ioned across said passage, a tubular member, closed at one end open at the other, suspended from said plate, apertures in the side of the tubular member, a chamber around the tubular member enclosing" said apertures, openings in the chamber and tenr perature responsive means for closing said,

openings.

2. In combination, a plate adapted to fit Within a passage, a tubular member suspended from said plate, openings in said tubular member, a chamber positioned around said tiibular member and enclosing said openings, apertures in :said chamber and thermostatically controlled means for closing; and opening said. apertures, and a coiled spring; around said tubular member holding said chamber in spring pressed i-elation to said plate.

3. A construction as set forth in claim 1, wherein said chamber is formed of a concave and a convex plate, each having a marginal flrnge abutting the marginal flange on the other.

4, In ;.combination, a passage, a plate posi tioned across said passage, a tubular member suspended from saidplate, and means surrounding said tubular member for control ling the flow of liquid thru said passage.

In combination, apassage,a plate positioned across said passage, atubular member suspended from said. plate, apertures in said tubular member, and temperature responsive means for controlling the flow of liquid thru said apertures.

6. Incomibination, a passage, a plate positioned across said passage, a tubular member suspended from i said plate, said tubular member having an opening thru said plate to said passage, apertures in the side of said tubular member, a and means surrounding said tubular member for controlling liquid flow thru said latter apertures.

HARRY, WVOOLSON. 

